Mixing-machine.



rlvglu UR 757,144

Nofvsmafnm' PUBMED APB.. 12, 1904.

W. G. RICHARDSON.

MIXING MACHINE.

nruonxox nu our. n. nos.

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No. 757.11m

'ILLLLH G. RICHARDSON, OF MILVUKEE, 'WISCONSIN L Patented Api-n 12, 1904. A

SPECIFICATION forming part of Letters Patent No. 757,144, dated April 12, 1904.

Application filed October 12, 1903.

vented a new and useful improvement in Mixing-Machines, of which the following is a description, reference being had to'th'e accom-,l

panying drawings,v which are apart of this specification.

lo My invention has relation toimprovements in mixing-machines adapted especially for mixing and kneadingr the batter for cakes, puddings, and the like.

The object is-to provide an improved con- I5 struction of such character as to eii'ect the kneading and mixing operation in a thorough and expeditious manner; and with this primary object and other incidental objects in view the invention consists of the devices and parts or their equivalents as hereinafter set forth.

In the accompanying drawings, Figure] is an elevation of my invention, one of the securing-arms of the bowl-bracket being in cross-section and the bowl to which the device is applied beingin vertical section. Fig. 2 is a plan view of the device and the bowl to which the .same is applied. 'Fig..3 is a cross .section on the line 3 Bof Fig. 1'; and Fig. is

an ele :tion of the operating-shaft :md parts by the shaft, the said parts being in es the bowl to which the mixer is ad- ..:;d which bowl is adapted to contain the. initier or materials to be mixed.

The stirring-shaft of the mixer is indicated by the numeral 6. Thisshaft. may be mounted in any suitable form of bearings and may' be'rotatcd through anydesirable means. In 4the drawings I show a convenient forni of bearings consistimr of the upper and lower sleeves or boxes l and 8, respectively. connected by thc outwardly-bowed arms i, and theupperbearinghavingextendingupwardly therefrom and integral or rigid therewith a handle 10.

Il.`he means sho\vxi`ln.the drawings for rotating the shaft G consists of a beveled gear 11, mounted fast, on tho shaft. and located 5 thereon just above the lower bearing sleeve or etmaal-175,588. annoia.) '.f

box 8, said beveled gear 11 being in mesh with asimilar gear l2 on the inner end Aof a driveshaft 13, said-shaft having its bearing-in one of the outwardly-bowed arms Q and operated by means of a suitable handlefor crank 14. $5

As above suggested the particular form of bearings for the stirrer or mixer shaft and the particular means for rotating said shaftshown '-in -the drawin'gs :ind above described are not essential, inasmuch as any desirable form of bearings and any desirable means for rotating the shaft maybe employed. For instance the shaft may be rotated by means of a. crank or other power applied directly to the upper end of said shaft..

The bracket for connecting the device to the bowl containing the materials to be mixed consists of one long arm 15 and two shorter arms 16 16, the said arms radiating from a hub 17, which hub surrounds the lower bearing sleeve or box 8 and is detachably securai thereto by means of a set-screw 18, turning 5 5.

through a-threaded opening inthe-hub and engaging at its inner end against the said bearing. By the provision of the long arm f-j andthe two shorter arms radiating from a of said bracket at their outer ends are of 8 5 1 slightly-hooked form, so as to engage over the rounded upper rim or edge of the bowl, while the other arm, preferably the longer one, is provided at. its outer end with adownwardly-extending lug 19, having a threaded 9 opening through which a set-screw 20 is adaptedto be turned, so that the inner end of said screw will inipinge against the outerside of the bowl just below the upper rim of said bOWl. 1 'v4 "i v' The stirring or mixing mechanism consists of a series of arms 21, radiating from the stirrer-shaft, and aseries of mixing-blades 22, one blade depending from the outer end of each radiating arrn. The radiating arms are :oo

preferably adjustably mounted on the shaft so that the blades may be made to adapt them selves to different depths of bowls, and in order to provide for this adjustability the said 5 arms radiate from a hub 23. which is adjustably secured to the stirrex-shaft b v means of a set-screw Q4. It will be noticed that each mi \'.iugfblade depends froxn-tlie--outer end of each radiating arm in a straight line downwardly for a slight distance, as indicated by the numerals 25, while for the balance of its lengtlrcach blade is disposed at an angle oblique to the radial arm from which it depends.

It will be further noted that the. outer edge of I5 cach blade` or the edge thereof which is closest to the side of the bowl. is convex throughout the oblique portion of the blade, while the inner edge, or the edge farthest. removed from the side of the bowl, is preferably concaved throughout the oblique portion of the lengt-h of the blade. It will also be seen clearly by Fig. 3 of the drawings that. each blade is concave-convex in cross-section, the

convex side being outermost, whereby a better rubbing eti'ect is 'produced by the blade.

Each blade is also provided throughout its surface with a series of openings 26.

In the use and operation of myinvention the our, seasoning, and liquids constituting the 3 batter are placed in the bowl. The stirrershaft is then rotated ina direction to cause the inner edge, or the edge of cach blade farthest removed from the bowl, to be the advancing edge, which by the particular driving means shown in thedrawings is accomplished by turning the crank 14 away from the operator. For

the purpose of making the operation clear it will be assumed that one of the blade-carrying arms is beneath and parallel with the 4 longer arm 15 of the bracket at the beginning of the operation. At this position said blade is at the maximum distance away from the inner side of the wall of the bowl. Following the course of this blade in its travel 4S around the bowl, it will be evident that as said blade leaves its position beneath the long,r ar`m and travels away from said arm it. will approach nearer and nearer to the wall of the bowl, and when it reaches the first short arm 5 and is beneath and parallel with said arm its outer convex edge will bear tirmly against the,

wall of the bowl` and this bearing contact will be maintained in the travel of the blade in the space from the tirst short arm to the other, and as the blade travels away from the latter arm tbe distance between said blade and the wall of the bowl gradually increases, and by the time the blade again passes beneath and is parallel with the long arm of the bracket 6 said blade will have again reached its maximum distance from the side of the bowl. From this description of the operation it will be evident thatduringa fractional part of the circular travel of each blade it. approaches nearer and nearer to the wall of the bowh that in a succeeding fractional part of the travel of the blade its outer edge is in bearing contact with the wall of the bowl, and that. in the remaining fractional part of the travel The etlcct of this operation is as follows: By

blade is disposed the said blade,'starting from its position beneath the long arm of the bracket, willgradually approach toward the side of the bowl. and consequently gather a. quantity of the dough or batter between its outer side and the inner side of the bowl and gradually press said batter toward and against 8c the side of the bowl, theouter edge of the blade at the same time gradually working toward the side of the bowl, until the blade reaches a position beneath the first short arm.

in bearing contact with the wall of the bowl, and this bearing contact will continue with the travel of the blade in the space bounded between the two short arms of the bracket, and consequently during this portion of the move- 9 ment of the blade the mass of material is more cectuallyconncd between the outer side of the blade and the wall of the bowl, and hence isI subjected to a most thorough rubbing and kneading action against the side of the bowl and all lumps or bard particles are e'ectnally ground or reduced. The convex shape of the outer edge of each blade enables said outer edge to accurately conform to and contact of travel in the space between the two short' arms of the bracket. After the blade passes beneath the second short arm ofthe bracketits distance from the wall of the bowl'` as stated,

blade gradually works away from the wall of the bowl, and consequently the mass of material beneath the blade is permitted togradually escape or pass between said outer edge and material acted upon by the blades in theireix` cular path of travel and which does not get beneath the blades is turned over the upper side of said blades, and particularly is this bounded by the two short arms of the bracket.. Also some of the mass of material during the travel of the blades oozes through the open. ings of said blades, and the material so oozthrown over the inner sides of the4 blades and tlms causes air-bubbles to accumulate in the batter, and thereby lighten the dough. The inner edge of each blade is advantageously straight it would make the blade so wide xls-to accumulate thereunder too large a mass of the material. which would result. not only in renl dering the operation of turning the blades in a circular path more ditiicult, but at tbe same 13 of the blade the distance between said blade 7 l and the wall of the bowl gradually increases.

At this time the outer edge of said blade will be 85 with the wall of the bowl during the period 109 gradually increasesand the outer edge of said vws the wall of the bowl. Such of the mass ofA 1wl true when a blade is traveling in the space ing through the openings meets the material 12si made concave, inasmuch as if this edge were s... ...mlm

` time would lessen the elltctivcness of the operation of mixing. lt will be further noted that each blade gradually approaches nearer and nearer to the surface of the howl from the upper edge of said blade downwardly, so that when a blade reaches the eccentric position or the space between the two shortarms of the bracket the entire convex outer edge of each blade is made effective-that is to say, the entire convex edge longitudinally will be in bearing contact with the side of the bowl. A further result of the operation is that if after one blade passes the space wherein its outer edge bears against the side ofthe bowl, or, in other words` the space bounded by the two short arms of the bracket, the material beneath said blade will pass or escape by the out-er edge of the blade and will be caught by the next succeeding blade of the series, and hence any hard lumps which may not have been reduced or ground by the action of the preceding blade will be again subjected to a rubbing or grinding operation by said succeeding blade.

The blades are preferably made of springsteel, so as to givemore or less flexibility hthereto, the yielding being desirable in order to render each blade capable of a steady rubbing action against the side of the bowl in view of the fact that the flexibility or yielding capability allows the blade to adjustitself to the shape of the side of the bowl.

It will be noticed that the bracket comprising the hub 1i', the long arm 15, andthe short arms 16 is readily removable or detachable from the stirrcr-shaft and that the bracket carrying the stirring-blades is also detachable from said shaft. This provides for removing the brackets referred to and substituting other brackets therefor to fit a ditferent size of bowl.

'hat I claim as my invention is- 1. In a mixing-machine, the combination of a bracket adapted to be adjusted above a bowl or other receptacle, a shaft rcvoluble in said bracket and eccentrically mounted therein,

- arms extending outwardly from the shaft and rotatable therewith,and stirrer-blades depending from the armsand extending into the bowl, said blades being so constructed that, in conjunction with the eccentric mounting of the shaft, each of said blades in its circular path of travel around the bowl is for a fractional part of its travel caused to approach nearer and nearer to the side of the bowl, for another a bracket adapted to be adjusted above a bowl or other receptacle, a shaft revoluhle in said bracket and eccentrically mounted therein, arms radiating outwardly from the shaft and rotatable therewith and stirrer-blades depending from the arms and extending into the bowl and set at an angle oblique to the radialarms, said blades being so constructed that, in conjunction with the eccentric mounting of the shaft, each of said blades in its circular path of movement around the bowl is caused for a fractional part of its travel to approach nearer and nearer to the side of the bowl, for another fractional portion of itstravclto have its outer edge in contact with the wall of the bowl, and for the remaining fractional portion of its circular path of travel to gradually increase its distance from the side of the bowl until the terminal point of one complete circular path of travel is reached, at which point the blade is at its maximum distance from the side of the bowl.

3. In amixing-machine, the combination of a bracket adapted 'to be adjusted above a bowl or other receptacle, a shaft revoluble in said bracket and eccentrically mounted therein, arms radiating outwardly from the shaft and rotatable therewith, and stirrer-blades d@ pending from the arms and extendinginto the bowl, said blades being concave-convex in cross-section, with the convexit-y outermost., and said blades being so constructed that, in conjunction with the eccentric mounting of the shaft, each of said blades in its circular path of travel around the bowl is caused for a fractional part of its travel to approach nearer i and nca rer tothe side of t-he bowl, for another l fractional portion of its travel tohave its outer edge in contact with the wall of the bowl, and for the remaining fractional portion of its ciri cular path of travel to gradually increase its l distance from the side of the bowl until the g terminal point of one complete circular path y of travel is reached. at which point the blade is at its maximum distance from the side of l the bowl.

4. In a mixing-machine, the combination of a bracket adapted to be adjusted above a bowl i or other receptacle, a shaft revoluble in said bracket and eceentrically mounted therein, 5 arms extending from the shaft and rotatable i therewith, and stirrcr-blades depending from i the arms and extending into the bowl, said. blades having a series of openings there 1 through. and said blades being so constructed fractional portion of its travel to have its outer that, in conjunction with the eccentric mountedge in contact with the wall of the bowl, and ing of the shaft, each of said blades in its cirfor the remaining fractional portion of its cirl cular path of travel around the bowl is caused cular path of travel to gradually increase its i for a fr ictional part of its travel to apdistance from the side of the bowl until the preach nearer and nearer to the side of the terminal point of one complete circular path bowl` for another fractional portion of its 0f travel is reached, at which point the blade i travel to have its outer edge in contact wlth is at its maximum distance from the side of the wall of the bowl. and for the remaining the bowL fractional portion of its circular path of travel 2. In a mixing-machine, the combination of to gradually incrcaseits distance from the side ofthe bowl until the terminal point of one complete circular path of travel is reached, at which point the blade is at its maximum distance from the side of the bowl.

5. In a mixing-machine, the combination of a bracket adapted to be adjusted above a bowl or other receptacle, a shaft revoluble in said bracket and eccentricalLv mounted therein,

.armscxtcading outwardly from the shaft andv the bowl, for another fractional portion of its travel to have its outer edge in contact with the wall of the bowl, and for the remaining fractional portion of its circular path of travel to gradually increase its distance from the side of the bowl until the terminal point of one complete circular path of travel is reached, at which point the blade is at its maximum distance from the side of the bowl.

6. In a mixing-machine, the combination of a bracket adaptged to be adjusted above a bowl or other receptacle. a shaftl revoluble in said bracket and eccentrically mounted therein, arms radiating outwardly from' the shaft and rotatable therewith` and stirrer-blades dcpending from the arms and extending into the bowl, and set at angles oblique to the radial arms, the inner edges of the blades being concave, and said blades being so constructed that in conjunction with the eccentric mounting of the shaft each of said blades in its circular path of travel around the bowl, is for a fractional part of its travel, caused to ap proach nearer and nearer to the side of the bowl, for another fractional portion of its travel to have its outer edge in contact with the wall of the bowl` and for the remaining fractional portion of its circularpath of tmvel to gradualljincrease its distance from the side of the bowl until the terminal point of one complete circular path oftravel is reached, at which point the blade is at its maximum distance from the side of the bowl.

7. In a mixing-n1achine, the combination of a bracket adapted to be adjusted above a bowl or other receptacle, a shaft rcvoluble in said bracket and eccentrically mounted therein, arms radiating outwardly from the shaft and rotatable therewith. and stirrer-blades dependingr from the arms and extendinginto the bowl, said blades being concave-convex in cross-section and having their outer edges convex, and said blades being farthest away from the wall of the bowl at their upper ends.

point of one complete circular path of travelis reached, at which point the blade is at its maximum distance from the side of the bowl.

8. In a mixing-machine. the combination of a bracket comprising a huh, a long arrn radiating from the hub, and two shortarms also radiating from the hub, the outer ends of said arms adapted to engage the rim of a bowl or other receptacle, a stirrer shaft revolnbly mounted inthe hub, arms extending from the stirrer-shaft. and stirrerblades depending from said arms and extending into the bowl, said blades beiner so constructed that, inconjunction with the eccentric mounting of the shaft, cach of said blades in its circular path of travel around the bowl from the space between the long arm and one short arrn being caused to approach nearer and nearer to the side of the bowl. in the space bounded between the two short arms to have its outer edge in Contact with the wall of the bowl, and in the space between the last short arm and the long arm, to have its` distance from the wall of the bowl gradnallj increased, until the terminal point of one complete circular path of travel is reached, at which point the blade is at its maximum distance from the sidc of the bowl. 1n testimony whereof Iatlix my signature in presence of two witnesses.

'ILLIAM G. RICHARDSON. 'itnesses:

A. L. Bloesem, ANNA F. Scinunraacea.

and gradually approaching nearer the wall of TOO 

